diff --git a/dev_requirements/requirements-type_check.in b/dev_requirements/requirements-type_check.in
index 4446a91..0944839 100644
--- a/dev_requirements/requirements-type_check.in
+++ b/dev_requirements/requirements-type_check.in
@@ -1,2 +1,3 @@
 # specific requirements for the tox type_check environment
 mypy
+types-pytz
diff --git a/dev_requirements/requirements-type_check.txt b/dev_requirements/requirements-type_check.txt
index 0332a5b..2131bc8 100644
--- a/dev_requirements/requirements-type_check.txt
+++ b/dev_requirements/requirements-type_check.txt
@@ -1,13 +1,14 @@
-# SHA1:7983aaa01d64547827c20395d77e248c41b2572f
 #
-# This file is autogenerated by pip-compile-multi
-# To update, run:
+# This file is autogenerated by pip-compile with Python 3.11
+# by the following command:
 #
-#    pip-compile-multi
+#    pip-compile requirements-type_check.in
 #
 mypy==1.11.1
-    # via -r dev_requirements/requirements-type_check.in
+    # via -r requirements-type_check.in
 mypy-extensions==1.0.0
     # via mypy
+types-pytz==2024.1.0.20240417
+    # via -r requirements-type_check.in
 typing-extensions==4.10.0
     # via mypy
diff --git a/pyproject.toml b/pyproject.toml
index 8c2b673..2bab039 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
 ]
-dependencies = []     # add all the dependencies here
+dependencies = ["pytz"]     # add all the dependencies here
 dynamic = ["readme", "version"]
 
 [project.urls]
diff --git a/requirements.txt b/requirements.txt
index 79ca470..7a78c06 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,5 @@
 #
 #    pip-compile pyproject.toml
 #
+pytz==2024.1
+    # via efoli (pyproject.toml)
diff --git a/src/efoli/edifact_format_version.py b/src/efoli/edifact_format_version.py
index d20fd42..d0d168a 100644
--- a/src/efoli/edifact_format_version.py
+++ b/src/efoli/edifact_format_version.py
@@ -1,9 +1,14 @@
 """contains the EdifactFormatVersion enum"""
 
 import datetime
+from typing import Union
+
+import pytz
 
 from .strenum import StrEnum
 
+_berlin = pytz.timezone("Europe/Berlin")
+
 
 class EdifactFormatVersion(StrEnum):
     """
@@ -25,7 +30,7 @@ def __str__(self) -> str:
         return self.value
 
 
-def get_edifact_format_version(key_date: datetime.datetime) -> EdifactFormatVersion:
+def get_edifact_format_version(key_date: Union[datetime.datetime, datetime.date]) -> EdifactFormatVersion:
     """
     Retrieves the appropriate Edifact format version applicable for the given key date.
 
@@ -36,6 +41,8 @@ def get_edifact_format_version(key_date: datetime.datetime) -> EdifactFormatVers
     :param key_date: The date for which the Edifact format version is to be determined.
     :return: The Edifact format version valid for the specified key date.
     """
+    if not isinstance(key_date, datetime.datetime) and isinstance(key_date, datetime.date):
+        key_date = _berlin.localize(datetime.datetime.combine(key_date, datetime.time(0, 0, 0, 0)))
     format_version_thresholds = [
         (datetime.datetime(2021, 9, 30, 22, 0, 0, 0, tzinfo=datetime.timezone.utc), EdifactFormatVersion.FV2104),
         (datetime.datetime(2022, 9, 30, 22, 0, 0, 0, tzinfo=datetime.timezone.utc), EdifactFormatVersion.FV2110),
diff --git a/unittests/test_edifact_format_version.py b/unittests/test_edifact_format_version.py
index 674e220..7d04e61 100644
--- a/unittests/test_edifact_format_version.py
+++ b/unittests/test_edifact_format_version.py
@@ -1,4 +1,4 @@
-from datetime import datetime, timezone
+from datetime import date, datetime, timezone
 
 import pytest
 
@@ -11,7 +11,12 @@
         pytest.param(
             datetime(2021, 1, 1, 0, 0, 0, tzinfo=timezone.utc),
             EdifactFormatVersion.FV2104,
-            id="Anything before 2021-04-01",
+            id="Anything before 2021-04-01 (datetime)",
+        ),
+        pytest.param(
+            date(2021, 1, 1),
+            EdifactFormatVersion.FV2104,
+            id="Anything before 2021-04-01 (date)",
         ),
         pytest.param(datetime(2021, 5, 1, 0, 0, 0, tzinfo=timezone.utc), EdifactFormatVersion.FV2104),
         pytest.param(datetime(2021, 10, 1, 0, 0, 0, tzinfo=timezone.utc), EdifactFormatVersion.FV2110),
@@ -28,6 +33,8 @@
         pytest.param(datetime(2024, 9, 30, 22, 0, 0, 0, tzinfo=timezone.utc), EdifactFormatVersion.FV2410),
         pytest.param(datetime(2025, 3, 31, 22, 0, 0, tzinfo=timezone.utc), EdifactFormatVersion.FV2410),
         pytest.param(datetime(2025, 4, 3, 22, 0, 0, tzinfo=timezone.utc), EdifactFormatVersion.FV2504),
+        pytest.param(date(2025, 4, 3), EdifactFormatVersion.FV2410),
+        pytest.param(date(2025, 4, 4), EdifactFormatVersion.FV2504),
         pytest.param(datetime(2025, 9, 30, 22, 0, 0, tzinfo=timezone.utc), EdifactFormatVersion.FV2510),
         pytest.param(
             datetime(2050, 10, 1, 0, 0, 0, tzinfo=timezone.utc), EdifactFormatVersion.FV2510